Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.
All
Vintage ZM450
reviews
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Manufacturer details
Features
Specifications
- Power Output RMS: 50 watts x 4 @ 8Ω, 90 watts x 4 @ 4Ω or 2Ω, 160 watts x 2 @ 8Ω (Bridged), 200 watts x 2 @ 4Ω (Bridged)
- Frequency Response: 10 Hz - 60 kHz, +0/-3 dB
- Total Harmonic Distortion: < 0.05% at typical listening levels, < 1.0% at full power
- Interchannel Crosstalk: 70 dB at 20 kHz
- Input Sensitivity: 700mv = Full output (50 Watts @ 8 Ω)
- Total Gain: 29 dB
- S/N Ratio: > 112 dB, input shorted, IHF A-weighted
- Dimensions: 8.5" (220 mm) W x 10" (254 mm) D x 2" (51 mm) H with feet, 1.75" (45 mm) H without feet
- Weight: 4.5 lbs (2.0kg) Net, 7.5 lbs (3.4kg) Shipping
Description
Unlock the full potential of your audio system with the Parasound ZoneMaster 450 Universal Amplifier. Designed to elevate your sound experience, this powerhouse delivers exceptional performance across four channels and can power up to eight speakers simultaneously. Immerse yourself in rich, dynamic sound as the ZoneMaster 450 brings your music to life with stunning clarity and precision. With its versatile configuration options and robust construction, this amplifier seamlessly integrates into any setup. Take your audio to the next level with the Parasound ZoneMaster 450 Universal Amplifier and experience the true essence of high-fidelity sound.
Release Timeline
Manufacturer Site
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- Parasound partners with legendary designer John Curl to create high-performing, reliable audio equipment known for its exceptional value.
- The brand meticulously selects high-quality components to minimize noise and distortion, often using parts that are no longer widely available, demonstrating a commitment to sonic neutrality.
- They offer versatile products with extensive input/output options, including unique features like adjustable subwoofer crossovers and gain matching capabilities.
- Parasound carefully balances high power output with finesse, resulting in a sound signature that is both dynamic and easy to listen to for extended periods.
Select products
Select product comparisons
HALO A23+
- Positioning: The entry-level power amplifier in Parasound's lineup.
- Description: Offers a compelling audio experience with its high bias Class A/AB operation, delivering 160 watts per channel into 8 ohms. It stands out with its direct-coupled design, which maintains signal purity and enhances transparency, unlike the more powerful A21+ which offers higher wattage and larger transformer capacity. This makes it ideal for smaller rooms or those on a tighter budget who still want high-quality sound.
HALO HINT6
- Positioning: An integrated amplifier that combines preamp and power amp functions in one unit.
- Description: Provides high-end performance with 160 watts per channel into 8 ohms, featuring a Burr Brown analog resistor ladder volume control for precise adjustments. It offers more connectivity options and a built-in DAC compared to the A23+, making it suitable for users needing an all-in-one solution with digital inputs and phono stage for vinyl enthusiasts.
HALO A21+
- Positioning: A mid-tier power amplifier offering more power and features than the A23+.
- Description: Delivering 300 watts per channel into 8 ohms, the A21+ is designed for those seeking more power and dynamic range. It features a larger transformer and higher filter capacitance than the A23+, providing better performance for larger rooms or more demanding speakers.
JC5
- Positioning: A high-end stereo power amplifier in the Parasound lineup.
- Description: Combines the power of monoblocks in a stereo amplifier, delivering 400 watts per channel into 8 ohms. It offers ultra-high bias Class A/AB operation, providing a more refined sound compared to the A21+, with a dual-mono design for superior channel separation.
JC1
- Positioning: The flagship monoblock power amplifier in Parasound's lineup.
- Description: Represents the pinnacle of Parasound's engineering, delivering 450 watts into 8 ohms with the first 25 watts in pure Class A. It features Bybee Music Rails for noise reduction and a custom R-core transformer, offering unmatched power and precision compared to the JC5. This groundbreaking amplifier makes it perfect for the most discerning audiophiles with large budgets and high-performance loudspeakers.
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Avg. Product Price
$500
Used For Sale
243
Available (Scroll Down)
Brand Popularity
20
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
28
Founding Year
1981
Our take on the brand
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
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Our interview with the brand
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What are your favorite tracks for showcasing the strength of your products?
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Used
Parasound
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What if you spend more?
Parasound
NC 275v2
849
849
/
3
Reviews
Low profile great power
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
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Our summary
Product Strengths
- Delivers 'maximum bang for the buck' sonic performance, uniquely useful features, and Parasound's renowned reliability
- Has a fairly neutral sound that leans towards the forward side
- Delivers great power for the dollar and is well made
- The midrange is very clean and articulate
- The bass is very tight, quick, and clean
- The noise floor may be noticeable with speakers of very high power efficiency (96 DB or higher)
- May sound a little forward in the treble with certain speakers
Product Considerations
- The noise floor may be noticeable with speakers of very high power efficiency (96 DB or higher)
- The amplifier may sound a little forward in the treble with certain speakers
Comparisons (according to reviewers)
- Vs Parasound Zamp V3, the 275 V2 improves on the Zamp V3 in every way, except for size
- Vs Parasound HCA-1200, the NewClassic 275 v.2 may have sounded a tad sweeter than the Parasound HCA-1200, however, it is so subtle it was difficult to distinguish between the two power amplifiers
- Vs Quicksilver Audio tube monoblocks, the NC 275 V2 amplifier provided a direct comparison to the tube amplifiers
- Vs Halcro amplifiers, the NC 275 V2 gave up some control and pitch definition in the bass notes
Takeaway: The NC 275 V2 is a versatile amplifier that offers great value and solid audio performance for both standalone stereo systems and complex audio distribution setups. It is well-built and has a neutral sound signature, making it suitable for a variety of speakers.
Video review
Our take on the brand
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
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Topping
LA90
799
799
/
10
Reviews
Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.
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Our summary
Product Strengths
- Delivers a clean and detailed sound, allowing listeners to hear nuances in recordings
- Offers good instrument separation and imaging
- Has a low noise floor, creating a 'black background' and enhancing the listening experience
- Compact size for an A-B amplifier
- Does not have RCA inputs, requiring XLR or TRS balanced connections
Product Considerations
- May not have enough power for inefficient speakers or large rooms
- External power supply 'brick' is large
- No remote control
Comparisons (according to reviewers)
- The LA90 has a more neutral sound than Cambridge Audio AXA25, which is cleaner and more detailed
- The LA90 comes close to Benchmark AHB2's performance, but does not outperform it in bass impact and soundstage size, and the AHB2 also has more protection systems
- The LA90 offers more vocal clarity and fuller bottom end than Schiit Vidar, but the Vidar is more exciting on top
- Emotiva A1's have more power
Takeaway: The Topping LA-90 Discrete is a small amplifier that produces very clear sound with good detail, making it great for those who already have balanced audio equipment. It could be a nice upgrade for those seeking to hear all the subtleties in their music.
Video review
Our take on the brand
Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.
Product Page
Product Page
Topping
LA90 (Discrete)
799
799
/
9
Reviews
Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.
Expand Details
Product Strengths
- Impressive specs and measurements showcase extremely low noise and distortion
- Clean and transparent sound aims for a neutral reproduction of music
- Compact size and sleek design make it suitable for small spaces
- CNC machined aluminum chassis allows for maximum thermal flow to keep the unit running cool
Product Considerations
- Included external power supply is large and heavy, which can be a challenge to hide
- Power output may be limiting, especially with demanding speakers and for high dynamic range tracks
- Bass performance, while tight and controlled, may lack sub-bass extension and impact for some listeners
- Lack of a remote control limits its convenience as an integrated amplifier
Comparisons (according to reviewers)
- The Discrete version matches the Topping LA90 IC based unit's exemplary performance, but betters it in power handling
- The Topping LA90 comes close to the Benchmark AHB2 in noise floor and detail retrieval, but the AHB2 has more power, impactful bass, and a bigger soundstage
Takeaway: The Topping LA90 is a compact and technically proficient amplifier that delivers a clean and transparent sound and with impressive specs. It is best suited for those with efficient speakers and a preference for accurate sound reproduction without coloration.
Video review
Our take on the brand
Topping Audio is a measurement-focused hifi brand that developed its own proprietary PSRM DAC architecture and NFCA amplifier topology to achieve exceptionally low distortion levels. Their products, from the flagship D90 III Discrete DAC to entry-level interfaces like the E2x2, use advanced technologies like custom I/V conversion stages and high-feedback Class B designs to deliver clean, accurate sound reproduction.
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Our summary
Product Strengths
- Bass performance is taut, detailed, and well-dampened
- Delivers a neutral presentation overall
- Has a solid steel chassis and milled aluminum faceplate
- The A1 is able to drive low impedance speakers with power and grandeur
- Produces 200 watts into 8 ohms and 325-350 watts into 4 ohms
- Only has a single line-level RCA-style input
Product Considerations
- Audible tweeter hiss may be present at idle, especially with highly efficient speakers
- High frequencies are not as smooth at the edges, exhibiting just faint traces of grain when listening at above-average levels
Comparisons (according to reviewers)
- Vs Rotel 1592 MkII amp: A1 is notably quieter and more detailed
- Vs Crown XLS Drive Core 2 amps: A1 is equally neutral in tone, has a lower noise floor, and a more consumer-friendly design
- Vs Schiit Vidar: A1 has a larger soundstage
Takeaway: The BasX A1 monoblock amplifier delivers good power and a neutral sound signature. It is a great option for those looking to expand an existing AVR or build a cost-effective hi-fi system.
Video review
Our take on the brand
Emotiva is a direct-to-consumer hifi brand that enables audiophiles to customize their amplifier configurations through a modular "Build Your Own" approach, using their Differential Reference design to minimize noise and distortion.
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What competes at this price?
Parasound
ZC ZAmp V0.3
299
/
Released
2023
The Parasound ZAmp v3 is a compact and versatile stereo amplifier, offering high-quality amplification in a space-saving design. With 45 watts per channel at 8 ohms, the ZAmp v3 is perfect for small audio setups, custom installations, and multi-room systems. Its reliable performance and efficient operation make it a go-to choice for both home and commercial environments.
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
Expand Details
Our Summary
Product Strengths
- Compact size and respectable heft make it suitable for desktops and small spaces
- Clean and clear sound with good detail retrieval, leaning slightly towards warm, but not overly so
- Enough power to drive moderately sensitive speakers well, especially in nearfield setups
- Features a headphone jack that shunts power from speaker outputs, and gain adjustments for customized sound
- Offers versatile connections for multi-room setups, including power triggers and loop outs
Product Considerations
- Treble presentation is on the forward side of neutral, with a little extra energy, which may not suit all preferences
- Speaker terminals are close together, which may cause issues with shorting if using spades or thick bare wire
- Not ideal for very high efficiency speakers due to a potentially audible noise floor
- May lack dynamic punch with low sensitivity speakers in larger listening spaces
Takeaway: The Parasound ZoneAmp V3 is a well-built and compact amplifier that offers a clean and detailed sound, suitable for desktop or small room use. Its versatile features and surprising sound quality make it a great option for those seeking a no-nonsense amplifier.
Video review
Our take on the brand
Parasound amplifiers are a favorite among hi-fi dealers because they offer a ton of power and performance without hitting crazy price levels. Designed by John Curl, their hifi and home theater amps are known for clean, neutral sound and an ability to power just about any system with ease. Sure, you can find better amps, but they come with serious diminishing returns. For a lot of people, Parasound hits that sweet spot where you feel like you’ve reached the endgame without spending a fortune.
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Burson
Funk
491
/
Released
2021
Hi-Fi companies are spoiling headphone enthusiasts with a wide range of choices, but they often overlook near-field audiophiles who listen to speakers in small studios or from their desktops. Instead, near-field audiophiles are left with subpar Class-D amps or active speakers. Alternatively, they have to settle for larger Class-AB amps that disrupt the aesthetic of their setups. The Burson Funk breaks that rule by offering a combination of exceptional performance and a design that fits seamlessly into any living space.
Burson is a hifi brand recognized for its modular op-amp design that allows users to easily swap components to customize their sound signature.
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Our Summary
Product Strengths
- Good sound quality, especially in the midrange, leads to vivid and well-formed vocals
- Versatile, it works well with both efficient headphones/IEMs and moderately powered speakers
- Compact design and good build quality, with the chassis acting as a heatsink
- Ability to roll op amps allows users to customize the sound signature
- Ample power for most headphones and nearfield speaker setups
- Only one RCA input, which may be limiting for some users
Product Considerations
- Speaker amplifier power (35-45W) might be insufficient for power-hungry speakers or larger rooms
- The base model op amps are sonically inferior to upgrade options
- Mild turn-off thump present
Comparisons (according to reviewers)
- The Funk has a narrower but deeper soundstage with better imaging and layering than the Arylic A08 Pro
- The Funk has superior imaging, but less potential power output depending on the Arylic's power supply than the Arylic A07/A08 Pro
- The Funk is preferred for desktop speaker setups with Vivid opamps when compared to Schiit Aegir
Takeaway: The Burson Funk is a solid choice for people wanting good sound from both their headphones and speakers in a single, convenient unit. The ability to change the sound by swapping op amps is a welcome feature for those who like to tinker and upgrade.
Video review
Our take on the brand
Burson is a hifi brand recognized for its modular op-amp design that allows users to easily swap components to customize their sound signature.
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Fosi
ZA3
129
/
Released
2023
The next generation balanced dual-mode Class-D power amplifier. Fosi Audio's first amplifier supporting both stereo and mono modes.
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
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Our Summary
Product Strengths
- Great value for the money and an attractive price point
- Balanced input and single-ended RCA input
- Op amps are swappable
- Compact form factor
- Versatile with stereo and mono mode
Product Considerations
- The volume control was found to be touchy by some reviewers
- The included power brick is quite large, almost as big as the unit itself
- The binding posts are small
- The RCA input sounds inferior to the XLR input
- The amplifier does not high pass the mains when a subwoofer is plugged in
Comparisons (according to reviewers)
- Vs Fosi Audio V3: ZA3 is considered a more mature version with stylistic elements and new features like balanced inputs and mono mode, with a naturalness in the tonal quality
- Vs SMSL AO200 MKII: AO200 MKII delivers better clarity, definition, and resolution of the sound
Takeaway: The ZA3 is a versatile and compact amplifier that offers great value, especially for those starting their audio journey. Its ability to be used in both stereo and mono configurations and the option to upgrade components make it a flexible choice for various setups.
Video review
Our take on the brand
Fosi Audio makes quality hifi accessible worldwide by offering a diverse range of amplifiers, preamps, and DACs that blend modern engineering with vintage-inspired design. Their products are engineered for versatility and power, serving both audiophiles and gamers with impressive performance at competitive prices. With a strong reputation built on solid reviews and customer focus, Fosi Audio stands out as a go-to brand for enthusiasts seeking exceptional sound without breaking the bank.
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Our Summary
Product Strengths
- Excellent build quality, featuring a CNC milled aluminum chassis and durable construction
- Achromatic Audio Amplifier (AAA) technology by THX, aiming for transparent sound reproduction without coloration
- Relay volume control provides precise channel matching
- Plenty of power to drive a wide range of headphones, from sensitive IEMs to demanding planars
- Balanced XLR inputs and outputs
Product Considerations
- No pre-amp output
- The notched volume control might not be to everyone's liking
- Gets quite warm during use, especially with the SU-9 DAC stacked on top
- Some reviewers noticed a clicking noise when adjusting the volume
- The three-feet design may not be as stable as a four-feet design
Comparisons (according to reviewers)
- Vs. SMSL SP200: Better unit at repelling noise, with a higher signal-to-noise ratio and lower total harmonic distortion—completely solved the SP200's issue with not having a pitch-black background
- Vs. Benchmark HPA4: Very close to the HPA4 in performance, with some minor differences observed only with high-end headphones
Takeaway: The SMSL SH-9 is a well-built and powerful headphone amplifier with a clean, transparent sound. It is a good choice for audiophiles looking for an accurate and detailed listening experience.
Video review
Our take on the brand
SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
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SMSL
HO100
217
/
Released
2022
HO100 Headphone Amplifier features an ultra-low distortion precision feedback circuit with distortion as low as 0.00006%, and an ultra-low noise power supply design that outputs noise as low as 1.3uV.
SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
Expand Details
Our Summary
Product Strengths
- Budget-friendly headphone amplifier focused on quality
- Robust all-aluminum exterior, with rigid toggle switches, and smooth volume control, giving it the same fit and finish as SMSL's higher-end HO200
- Delivers a clean, neutral, and transparent sound, faithfully reproducing the source audio without adding coloration
- Extremely low noise floor
- Versatile due to its three gain levels (low, mid, high) and its ability to drive both sensitive IEMs and harder-to-drive headphones
Product Considerations
- Lacks balanced and unbalanced outputs for connecting to powered speakers, functioning solely as a headphone amplifier
- Does not have preamp capability
- Reviewers have noted average microdetails
- While the design looks smart and subdued, the tempered glass panel easily grabs fingerprints, requiring frequent cleaning
Comparisons (according to reviewers)
- Vs SMSL HO200: HO100 lacks RCA/XLR outputs and has lower wattage, but is more compact and is preferred if the extra power and outputs are not needed
- Vs FiiO K5 PRO: It has better driving power, a lower noise floor with IEMs, and lower distortion at maximum volume
- Vs JDS Labs Atom+: It has higher maximum power, handles maximum volume better with lower distortion, and offers better overall detail in the micro detail, and a more relaxing signature
Takeaway: The SMSL HO100 is a compact yet powerful headphone amplifier that delivers clean, neutral sound suitable for various headphones. It is well-built and offers excellent value for audiophiles seeking a high-quality listening experience.
Video review
Our take on the brand
SMSL, a Shenzhen-based hifi brand, stands out for its use of advanced chipsets like Infineon's MERUS and ES9039Q2M, which have been objectively verified to deliver exceptionally low noise and distortion levels. The brand has earned acclaim from value-conscious audiophiles.
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