1. Matias

    Calyx Femti power amplifiers

    For sale are 3 units of Calyx Femti class D amplifiers. They are based on ICEpower 125ASX2 and they can be used: - Stereo. - Mono input, 2 channels output. - Bridged. They are built into a nice CNC machined chassis with the Calyx logo and a custom input board. Small, very heavy and good...
  2. ninetylol

    Why is an amplifiers distortion lowest on high volume?

    Sorry if this has been asked before, I couldnt find an answer so far. When looking at headphone amp measurements the distortion always goes down the more power you are putting out of it, except for when its clipping at the end. Is that correct? What is the physical explanation for this...
  3. pma

    Review and Measurements of vintage Yamaha AX-396 integrated amplifier

    Review and Measurements of vintage Yamaha AX-396 integrated amplifier This review shows measurements of Yamaha AX-396 integrated amplifier, ser. no. Y399871TV, made in Malaysia. I bought this amplifier in the year 2002 and have been using it shortly. Then it was sleeping in my stock and 5...
  4. AndrovichIV

    [SOLD] Project Polaris Amp and Project Kamaleon for sale

    Selling my Project Polaris Amp!! Unlike other audio purchases you know how this particular unit performs down to a T since Amirm reviewed it here. Original price for this unit is $250 I won't bother to put any pictures since Amirm is a far better photographer than I am :) $180 gets you the...
  5. H

    Is there anyone who has experienced NCDV amplifier from NewClassD ?

    Hello I'm a newbie here, and learning a lot of thing about class D amplifier these days reading forums. Once I have heard that NCDV S2 power amp was as good as Hypex NC400. But there was no information about it in this forum, that's why I started this thread. It is of course class D amp, but...
  6. M

    Do Amplifiers Have a House Sound?

    We've all heard it: Yamaha is spacious and likes its bass Marantz is warm and colored Onkyo is dark and shimmering (whatever...) Audiolab is neutral and cold Cambridge is midrange-centric Etc... Where do these ideas come from? Is there any psychoacoustic or another basis for them? Maybe in...
  7. M

    Does the Pure Direct Button Really Enhance Sound Quality?

    What does bypassing tone and loudness controls do exactly to enhance an amplifier's sound quality? Can anyone actually hear the difference? (I can't) If anyone can hear the difference, what does this difference consist of?
  8. D

    Chinese monobocks amps

    Hello. I read on this forum about good products from China , but they are only DAC -s , headphone amp . I am interested if there is companies which do not stereo amp but monoblocks amp. I'm looking for something with a good price in this subject . ( Cheep and good enough so not monoblocks with...
  9. pma

    Measurements of vintage Kenwood KA-5010 amplifier clone

    When I first saw schematics of vintage Kenwood KA-5010 amplifier, 2 years ago, I was immediately attracted and decided to build a circuit copy, better say a copy of the circuit topology with some newer solid state parts used. There were 2 points leading me to this decision - frequency...
  10. V

    ifi Zen Dac, thoughts, reviews?

    Hi All, I didn't see too many reviews on this yet so I thought to ask, has anyone here purchased/listened to the ifi Zen Dac yet? I recently purchased the ifi Zen Dac for home use with my desktop machine, and am not really sure what to make of it. For anyone wondering, this thing here...
  11. W

    Looking for advice on a 3 channel Hypex Ncore Amplifier - ATI vs Nord/Apollon

    Looking for advice on a 3 channel Hypex Ncore amplifier - ATI vs Nord/Apollon I currently have a ATI AT528NC amplifier which powers my surrounds and atmos speakers. I am looking for another amp for my LCR (Procella P8). I have decided to stay with a Class D amp specifically Hypex ncore based...
  12. RickSanchez

    Sabaj D5 vs. SMSL M500 vs. Topping DX7 Pro: measurement comparison

    Due to overwhelming ASR member demand (kidding) I thought it would be interesting to compare three high-performing DAC/amp combos: the Sabaj D5 vs. the SMSL M500 vs. the Topping DX7 Pro. Thanks to @amirm for all of the measurements; all of this info is from him (unless otherwise noted), I'm...
  13. Nationalizer

    Different sound tuning for different markets / continents for the same product?

    I just saw this old video and I just think it's wrong on so many levels. If this is a marketing video, it's very bad. NO ESD grounding, opening it on the carpet and not the right soldering tip. Also, what if I want the ORIGINAL sound? Not to mention all these will MEASURE differently. And...
  14. BillG

    NAD M10 Streaming Amplifier Lab Report... has run a performance analysis on the NAD M10 streaming, integrated amplifier recently, and this is what they found - I can't attest to the validity of it , though...
  15. pozz

    Master Index of Measurement Comparison Charts [Defunct]

    [Click here for the interactive table. This thread is now defunct.]
  16. R

    McIntosh MC252 Power Amplifier

    McIntosh MC252 Power Amplifier $3200 I'm offering MC252 in very good working condition. Voltage: 120V Cosmetic Description: 9/10 Excellent condition with no notable blemishes. What is Included: Amplifier, Remote, Manual, Factory packaging Functional Notes: Operational condition of this item is...
  17. R

    FS: Mark Levinson No. 535H 5 Channel Mono Amplifier

    I'm offering my Mark Levinson No. 535H 5 Channel Mono Amplifier at $3900 200w Per Channel at 8ohms New NOS Inventory - Unit comes with original packaging, accessory kit, and cables. No damage. Unit tested fully operational on all 5 channels. -Outside of Normal Factory Warranty Period-”...
  18. orchardaudio

    BOSC - HiFi Monoblock Class-D Amp

    Currently Under Development Preliminary Specifications: Gain: 16.8dB or 6.92 (For 8 and 6Ω speakers) Gain: 13.8dB or 4.89 (For 4 and 3Ω speakers) Signal to Noise Ratio (SNR): 121dB (A-weighted) Total Harmonic Distortion (THD): <0.0003% (-110dB) @ 7W Frequency Response: DC - 60kHz Sensitivity...
  19. F

    Want to keep my DACs sound but use external AMP for better bass response, possible?

    Hi all, So the challenge is this. I want to keep sound coming from my DAC (LG G5 smartphone) which I like alot, except it does not do bass well (I am aware of equalizers, but they don't do the job well). Is there a hardware combo for portable use that will let you keep the DACs sound but...
  20. Ratio

    [Teardown and Measurements] Swissonic HAD-1 AD/DA converter + headphone amplifier

    Hey guys, this is actually my first post on this forum so maybe a little introduction is in place. I am an electrical engineer from Finland and I've been in the headphone audio scene for quite some time now, went through a lot of gear and decided to do some measurements of my own. My measurement...
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