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Discussion in 'Amp Central Station' started by schenkadere, Oct 7, 2019.
This amp has 2 12AX7. Would I replace the 5751 for both?
I put a WGS Reaper 30 in my Blackstar. It's the opposite of a bright speaker.
Good or bad? Lol
It was too dark while in the break-in period. Now it sings wonderfully though.
The RWB has a sweet, vintage , Jensen TIGHT rounded Bass & Low-mids
the C Rex doesn't - gets boomy & nervous down there
I use the C.REX in a few of my amps and it sounds great after break in. Fits my style of playing nicely but it isn't the right speaker for every amp or every situation. I use a G12H30 in some of amps. I also have cabs that are loaded with different speakers that I will use with the same amps in different situations. You need to experiment.
What is right for me isn't necessarily a fit for somebody else.
a vintage 30 in an open back cab.
Thanks. The CRex may be too bassy for me after listening to clips and reading.
The GB128 seems like a good overall choice...maybe too much on the highs. The stock speaker is a 50w in a 5w amp. Is there any advantage or disadvantage to going up or down in speaker wattage?
Can a speaker be too efficient?
What you described is nearly identical to how they describe the Eminence Private Jack. Best of luck.
My two cents are it's fun to experiment. With my blues deluxe I tried different tubes, including the 5751, in all 3 preamp positions. I ended up with a 5751 in V1, a 12ax7 in V2 and a 12AT7 in V3, the phase inverter position. My goal had been to increase headroom, make the volume sweep more useable and get rid of some of the stingy highs. It definitely helped.
For example: You could try a 5751 in both positions but you may end up losing more gain than you had hoped - tweak to taste, basically
What do they mean by "extended highs"? trying to avoid fizz at all cost...well...reasonable cost, lol.
British flavored speakers are more prone to this; with their high mids & treble particular signature
I would try it in v1 for a bit then put the 12ax7 back in and try in v2. Also you might like it in both positions.
JJ tubes and Private Jack on the way.
I'm not sure. As usual, there's conflicting info on the net. I had a Private Jack and also a GB128. My experience and a lot of the reviews I've read have this recurring theme of losing bass and some of the higher highs being rolled off. A Celestion G12-65 will also roll off some high highs and have less bass than the heavier magnet Celestions. Some Fanes will also roll of the highs but will have big bass. Hiwatt guys may be able top help because a lot of Hiwatt ownership is managing highs and brute power. Hope this helps.
The PJ sounds like what I'm looking for and the clips sound right, for whatever that's worth. I found one new for $83.38 after tax and shipping. Not too bad. Got the tubes from Eurotubes, just because I've always used them and they actually do have the best prices I found. I stuck with the 12AX7's. It's the original design so I figured I'd just see what some JJ's do. I assume Mike Fortin had his reasons.
I have a feeling this will make a really good amp great. Thanks for all your help!
That isnt more headroom. It's less gain.
Sure, you'll be able to turn the knob further before it breaks up, but the volume at which it will break up will be the same and the overall gain reduced.
That said, it works for some people, though if the aim is to get more clean volume, it will not do.
If the amp has no choke, fitting a choke will increase the perceived headroom.
But that's up to you to try.
The easiest way to get more headroom is it get a really efficient speaker. Since you mentioned less highs, I would recommend a celestion V30. Very efficient, super smooth sounding and full sounding once broken in. They take for ever to break up though, so I'd recommend you buy used and save yourself some pennies along the way.
Actually, the JJ ECC83s, if that's what you've ordered, is very good at taming extra high end. Lots of people avoid it because of that, but it may well be a perfect fit in your quest. Their 6V6s are excellent too IMO.
The PJ is meant to be an excellent speaker, I'm sure you'll end up with a great rig.
Not a V30 fan. Went with an Eminence Private Jack. It’s a 50w speaker in a 5w amp. I think that should be ok. This Diavlo was designed with a 50w speaker so I stuck with that as I stuck with the 12AX7 since that was the design of the amp.