Symasym 5-3 amplifiers

hifinutt
Audio Addict

Posts: 1,146

Symasym 5-3 amplifiers Apr 11, 2023 14:15:38 GMT

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Post by hifinutt on Apr 11, 2023 14:15:38 GMT

whats the AA views on these amps ?

www.lf-pro.net/mbittner/Sym5_Webpage/symasym5_3.html

symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington EF outputstage using modern high beta devices. The circuit uses large amounts of feedback over the whole audioband and an unconventional feedback compensation scheme.

Right now symasym is designed to be driven directly from a CD/DVD-player, simply place a 22k poslog stereo pot between player and symasym. (as voltage divider)

www.ebay.co.uk/itm/134521165863?hash=item1f52161827:g:becAAOSwh1NjQphU

bel canto pre 5 into moom 330a / / primare cd35/ verity audio rienzi /Audioquest niagara 1200
bel canto E1X pre/dac , bluesound node
/ JH F5 mono / tannoy eaton legacy /puritan 156

bencat Junior Member Amplifier Destroyer Posts: 469	Symasym 5-3 amplifiers Apr 11, 2023 14:19:44 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by bencat on Apr 11, 2023 14:19:44 GMT I am not that impressed with what seems to be the idea that £925 is a low price .
	Amplifier Destroyer

hifinutt
Audio Addict

Posts: 1,146

Symasym 5-3 amplifiers Apr 11, 2023 14:39:22 GMT

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Post by hifinutt on Apr 11, 2023 14:39:22 GMT

do you think they are being sold too cheap andrew ?

I was reading an article in Which this month about price not always reflectiong quality and value . Have used JH F5 now for quite a while and they are pretty good . just need something a wee bit better than my arcam a85 which does sound good . needs to be fairly warm in presentation i.e not brutal !! easy to handle and not too hot running as stuffy loft . speakers are very delicate with superb finesse and 87db

Last Edit: Apr 11, 2023 14:42:40 GMT by hifinutt

bel canto pre 5 into moom 330a / / primare cd35/ verity audio rienzi /Audioquest niagara 1200
bel canto E1X pre/dac , bluesound node
/ JH F5 mono / tannoy eaton legacy /puritan 156

jandl100
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Posts: 1,396

Symasym 5-3 amplifiers Apr 11, 2023 15:00:44 GMT via mobile hifinutt likes this

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Post by jandl100 on Apr 11, 2023 15:00:44 GMT

£925 rrp is firmly in the lower to middle part of the market imo.

It amazes me, though, that Phil manages to ferret out these hifi obscurities!

I doubt if 99% of forum folks will have a view as I doubt they'd have ever heard of them before.

Jerry

internet streaming > SMSL SU-9 DAC/pre > Naim NAP 90/3 power amp > MBL116f speakers

Headphones are fun - Hifiman Sundara, Beyerdynamic DT 990, Audioquest Nighthawk, Monolith M1060, M1060c & M1570, Oppo PM3, B&O H6, KLH Ultimate One, BQEYZ Autumn IEMs (portable)

bencat Junior Member Amplifier Destroyer Posts: 469	Symasym 5-3 amplifiers Apr 11, 2023 15:19:34 GMT via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by bencat on Apr 11, 2023 15:19:34 GMT Having read to the end of the first link it is stated that free use for diy enthusiast is approved any comercial use for profit is not authorised . Where does that leave the ones for sale ?
	Last Edit: Apr 11, 2023 15:20:06 GMT by bencat Amplifier Destroyer

hifinutt
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Posts: 1,146

Symasym 5-3 amplifiers Apr 11, 2023 17:16:20 GMT jandl100 likes this

Quote

Post by hifinutt on Apr 11, 2023 17:16:20 GMT

Apr 11, 2023 15:00:44 GMT jandl100 said:

£925 rrp is firmly in the lower to middle part of the market imo.

It amazes me, though, that Phil manages to ferret out these hifi obscurities!

I doubt if 99% of forum folks will have a view as I doubt they'd have ever heard of them before.

thanks yes thats the problem . when one comes to sell no one will know what the heck they are !!!

bel canto pre 5 into moom 330a / / primare cd35/ verity audio rienzi /Audioquest niagara 1200
bel canto E1X pre/dac , bluesound node
/ JH F5 mono / tannoy eaton legacy /puritan 156

hifinutt
Audio Addict

Posts: 1,146

Symasym 5-3 amplifiers Apr 11, 2023 17:17:56 GMT

Quote

Post by hifinutt on Apr 11, 2023 17:17:56 GMT

Apr 11, 2023 15:19:34 GMT bencat said:

Having read to the end of the first link it is stated that free use for diy enthusiast is approved any comercial use for profit is not authorised . Where does that leave the ones for sale ?

ah yes they had a BIG debate about that on pfm !!! but not going there today . many folks love his stuff including me . the guy that had my f5 bought about 12 of the neurochrome off him if i recall .

bel canto pre 5 into moom 330a / / primare cd35/ verity audio rienzi /Audioquest niagara 1200
bel canto E1X pre/dac , bluesound node
/ JH F5 mono / tannoy eaton legacy /puritan 156

Post by hifinutt on Apr 11, 2023 14:15:38 GMT

Post by bencat on Apr 11, 2023 14:19:44 GMT

Post by hifinutt on Apr 11, 2023 14:39:22 GMT

Post by jandl100 on Apr 11, 2023 15:00:44 GMT

Post by bencat on Apr 11, 2023 15:19:34 GMT

Post by hifinutt on Apr 11, 2023 17:16:20 GMT

Post by hifinutt on Apr 11, 2023 17:17:56 GMT