HELP! about traynor yba-1a

[jerkass9879]

I'm looking to buy a traynor yba-1a. I was just wondering if anyone has any experience with using this amp with a 4ohm bass cabinet. I recently just bought a new ampeg 6x10 and my GK head recently went up. Will the traynor and ampeg 6x10 work or will it mess up the head.
thank you
-chris

 

[jastacey]

You do know that it is a 50 watt head .... Check this link out Invalid Link Removed

 

[SVTDOUBLEBUCK]

well it won't mess up the head at all, you are just going to be underpowering your cab by a lot....even though they are tube watts, it might sound good, try it out!

 

[jerkass9879]

i thought the yba-1a was rated at 90 watts and the yba-1 was only 50.

 

[jerkass9879]

i heard these heads are rated for 8ohm cabinets though. just trying to make sure it's not gonna screw anything up before i drop the money

 

[jastacey]

The yba-1 that I had years ago, was the 50 watter ... I have never played the yba-1a

 

[jerkass9879]

so can i use this amp with a 4ohm cabinet? anybody know?

 

[MIJ-VI]

YBA-1A Bass Master Mark II

Features: Same as YBA-1 except for a fan mounted in the side (1960s) or internally (1970s), also good for guitar - tubes were also same as the YBA-1

Approximate Serial Number: 0200 to 1800's = 1968 to 1970
006#### to 605####

Years Made: 1968-1976

Amp Type: Tube Head

Power: 90 Watts Sine Wave @ 8 Ohms

Comments: Same output tubes (two 6CA7s) as the YBA-1?! Yes, bigger transformers, filter caps, and fan cooling made it work.

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Music City in North Bay, Ontario, Canada used to rent the YBA-1A Mark II out with the YC-610 (5.3 Ω ) for bass use all the time, but going down to 4 Ω might be risky.

 

[metalmariachi]

The speaker jacks were wired in parallel and the cabs were 8 ohm each.
Yes it will work at 4 ohms and no it won’t blow up.

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MM

 

[jerkass9879]

thanks for all the help wasn't expecting an answer for a while.
does anyone play with this set up?

 

[jerkass9879]

anyone else? im trying to get as many opinions as I can. I have to decide around noon

 

[projectMalamute]

That is an incredibly robust amp. Freakishly tough. I wouldn't give a second thought to running at 4 ohms. I've run a YBA-1 at 4, 8, 16. It really doesn't seem to care at all.

 

[mongo2]

I've used my MkIIs with my 4 ohm 1x15. I haven't had any issues. BTW, mine needed power cap replacement.

One of mine has the "Silver" front panel, what's your's?

 

[jerkass9879]

this is the one im looking to buy, today actually.

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are these amps hard to install a master volume?

this is my first traynor so im sure im going to have alot more questions. and thanks again to everyone who has helped so far

 

[DaZombieWoof]

Those amps are eminently tweakable. Putting in a master volume would not be hard. Played one of them with a Traynor 8-10 cab once. At the time it was loud and ultimate tube rude.

 

[kraigo]

You do know that it is a 50 watt head .... Check this link out Invalid Link Removed

Nope - it's a YBA-1A - Mark II. It runs a high plate voltage, like an SVT. If you believe that an SVT is 300 watts (six power tubes run at a high plate voltage), then it is believable that a YBA-1A (two power tubes) is 100 watts. Most accounts say 80 to 100 watts.

KO

 

[kraigo]

The speaker jacks were wired in parallel and the cabs were 8 ohm each.
Yes it will work at 4 ohms and no it won’t blow up.

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MM

Conventional wisdom on the Traynor Amplifiers mailing list supports this assertion, as does my experience with old Traynor amps.

KO

 

[BassmanPaul]

Nope - it's a YBA-1A - Mark II. It runs a high plate voltage, like an SVT. If you believe that an SVT is 300 watts (six power tubes run at a high plate voltage), then it is believable that a YBA-1A (two power tubes) is 100 watts. Most accounts say 80 to 100 watts.

KO

Check the tube specs. The most you can get from a pair of EL34/6CA7 is seventy watts. To get that much you need a stabilized screen grid supply. !00W would be way over the plate dissipation level.

Paul

 

[projectMalamute]

Nope - it's a YBA-1A - Mark II. It runs a high plate voltage, like an SVT. If you believe that an SVT is 300 watts (six power tubes run at a high plate voltage), then it is believable that a YBA-1A (two power tubes) is 100 watts. Most accounts say 80 to 100 watts.

KO

Well the SVT is using a completely different tube. 90 watts from a pair of EL34's is pretty optimistic, no matter how you figure things. That said, the Traynor is a loud freakin' amp. Also great to work on, hand wired on a turret board. Hammond transformers. They really are great amps, better than most collectible stuff that costs 5 times as much.

 

[71Rick]

I've used my Traynor YBA-1 with a single 4ohm cab before. Sounded great. No issues.