Adaptor for amp issues

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Tordisc101
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Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 18:33

My Pioneer amp died and a friend gave me a very nice Bryston 2B-LP. However, the inputs are 3-pin and I need rca inputs. So, I purchased adaptors and I am getting no sound at all.

The set-up is very simple:
Turntable (Project) to pre-amp (Project Phono Box II) to Bryston amp. via adaptors.
I know that the pre-amp is working because I tested it on another amp.

Did I purchase the wrong adaptors or am I missing something else.
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Pretorius
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Re: Adaptor for amp issues

Post by Pretorius » 14 Feb 2019 21:33

Which model Pioneer were you using previously? Was it an integrated amp? With your new set up how are you controlling volume? You seem to be missing a preamp in this new set up.

But... If you have a 3.5 mini plug to RCA cable you could connect your cel phone (or other portable music player) headphone out and test your bryston amp & xlr adaptors while playing music with that devices volume control. That would confirm whether there is a problem in the amp or with the adaptors.

vintagevinyllover
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Re: Adaptor for amp issues

Post by vintagevinyllover » 14 Feb 2019 21:59

You have some nice friends! the Bryston is only a power amp. You need a preamp! The project box is a phono amp, that needs to be plugged into a preamp and thence to the Bryston
Last edited by vintagevinyllover on 14 Feb 2019 22:00, edited 1 time in total.

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 21:59

My previous amp was a Pioneer receiver with integrated pre-amp. However, I was using the Phono Box II connected to the aux input and everything sounded great for years until the Pioneer died. The Phono Box II pre-amp itself works well and I know the Bryston is fully functional: it came from a professional studio that was going through some upgrades.

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 22:01

vintagevinyllover wrote:
14 Feb 2019 21:59
You have some nice friends! the Bryston is only a power amp. You need a preamp!
I am using a pre-amp. In the original post I mention the Phono Box II pre-amp. And, yes, I do have great and generous friends :o

Pretorius
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Re: Adaptor for amp issues

Post by Pretorius » 14 Feb 2019 22:14

Yes, but you still need a preamp. The Pioneer receiver had an integrated preamp AND a phono preamp, which you bypassed by using the aux input, but you were still using the integrated preamp to control volume.

vintagevinyllover
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Re: Adaptor for amp issues

Post by vintagevinyllover » 14 Feb 2019 22:16

Sorry, I think the Project is just the phono stage. It is sometimes referred to as a pre-amp, but its a very specialised one in that all it does is magnify the cartridge signal a little and match RIAA. That signal needs to be fed into a line input of a pre-amp/integrated with volume control first. I think that's why it worked into your aux on the pioneer fine, the pioneer then took the signal from the phonobox and amplified it to your speakers. :D My apologies if I'm wrong as project make a lot of different boxes

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 22:20

Pretorius wrote:
14 Feb 2019 22:14
Yes, but you still need a preamp. The Pioneer receiver had an integrated preamp AND a phono preamp, which you bypassed by using the aux input, but you were still using the integrated preamp to control volume.
Ahh, now that makes sense. Thank you.
Do you have any recommendations for a preamp?

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 22:22

vintagevinyllover wrote:
14 Feb 2019 22:16
Sorry, I think the Project is just the phono stage. It is sometimes referred to as a pre-amp, but its a very specialised one in that all it does is magnify the cartridge signal a little and match RIAA. That signal needs to be fed into a line input of a pre-amp/integrated with volume control first. I think that's why it worked into your aux on the pioneer fine, the pioneer then took the signal from the phonobox and amplified it to your speakers. :D My apologies if I'm wrong as project make a lot of different boxes
Thank for this. It helps a lot. The wording from Project is a little confusing.
If you have any recommendations for a preamp I would appreciate it.

vintagevinyllover
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Re: Adaptor for amp issues

Post by vintagevinyllover » 14 Feb 2019 22:39

well, Bryston makes some lovely preamps, though beyond my budget, though could look at a good used one?! I don't know your budget or how many inputs you might want besides the one for the project box. Knowing those would help with making suggestions

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 22:46

vintagevinyllover wrote:
14 Feb 2019 22:39
well, Bryston makes some lovely preamps, though beyond my budget, though could look at a good used one?! I don't know your budget or how many inputs you might want besides the one for the project box. Knowing those would help with making suggestions
The only input I need is for the project box. I have a budget of under $500 Canadian.

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Re: Adaptor for amp issues

Post by JDJX » 14 Feb 2019 23:04

Tordisc101 wrote:
14 Feb 2019 22:20
Pretorius wrote:
14 Feb 2019 22:14
Yes, but you still need a preamp. The Pioneer receiver had an integrated preamp AND a phono preamp, which you bypassed by using the aux input, but you were still using the integrated preamp to control volume.
Ahh, now that makes sense. Thank you.
Do you have any recommendations for a preamp?

What is your budget"

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 14 Feb 2019 23:34

What is your budget


I have a budget of around $500 Canadian

vintagevinyllover
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Re: Adaptor for amp issues

Post by vintagevinyllover » 15 Feb 2019 08:13

ok, try Schitt, either the saga or freya preamps. Made in USA and ship to Canada

Tordisc101
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Re: Adaptor for amp issues

Post by Tordisc101 » 15 May 2019 01:35

vintagevinyllover wrote:
15 Feb 2019 08:13
ok, try Schitt, either the saga or freya preamps. Made in USA and ship to Canada
I cannot thank you enough for the great advice.
Mystery solved. The Bryston amp was indeed at fault. Someone had by-passed the factory inputs and rigged an alternate DIN socket combining the inputs. So, I was given another Bryston amp.

Also, happy to report that I bought a Loki and Saga from Schiit and the result is very impressive.
Thanks again.

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