Does anyone know the efficiency of the Sr71? I'm trying to figure out if it would be good to pair it up with an SE Tube amp.
on a bit of a side note, how much would be shipping on the boxless speakers to the uk???
guesstimate is good enough for me 😀
cheers guys
stu
guesstimate is good enough for me 😀
cheers guys
stu
ppchiu said:
I have the pair that Rabbitz mentioned. Same drivers, same cabinet volume and tuning, but a different x-o.
I could hook them up to, say, an 18watt chip amp (I've got one somewhere) and see what happens.
I don't have a low powered tube amp to try, unless someone sends me one 😉 but could possibly find a way to hook them up to my Dynaco MkIv's
I just recently put together the SR71 and I can say that the SQ is a step up from my 303s.
I went to a HiFi store to test out the 600s, I can't remember which exactly they were but they were the most expensive 6 before going to the tower versions. The 600s were undeniably better, especially in the bass/lower end. It's very strong yet it's not over powering while the SR71s just lack a bit of that strength. I didn't really expect this as my SR71 cabinet and driver is actually bigger than the 600.
Can anyone suggest any tweaks? All the tweaks on Zaph's website seem to be for the highs/tweeter.
I went to a HiFi store to test out the 600s, I can't remember which exactly they were but they were the most expensive 6 before going to the tower versions. The 600s were undeniably better, especially in the bass/lower end. It's very strong yet it's not over powering while the SR71s just lack a bit of that strength. I didn't really expect this as my SR71 cabinet and driver is actually bigger than the 600.
Can anyone suggest any tweaks? All the tweaks on Zaph's website seem to be for the highs/tweeter.
The listening room and speaker placement in that room have a large effect on the bass response of any speaker including the SR71. The first thing to try is repositioning the speakers in the room, if you provide some details of your arrangement, we can make some suggestions for improvement.
The next thing to try is adding series inductance to the 3.3mH baffle step inductor to increase the baffle step compensation. I would get something around .8-1mH and unwind it till it sounds right. Zaph will probably cringe if he reads this advice as he carfully selected the original value, but it can't hurt much to try.
One reason that the B&W may seem to have more bass is that it simply has more distortion in the bass frequencies. Higher distortion due to the woofer motor design could cause the perception of fuller bass. The SEAS woofer has very low distortion and will sound leaner as a result.
-David
The next thing to try is adding series inductance to the 3.3mH baffle step inductor to increase the baffle step compensation. I would get something around .8-1mH and unwind it till it sounds right. Zaph will probably cringe if he reads this advice as he carfully selected the original value, but it can't hurt much to try.
One reason that the B&W may seem to have more bass is that it simply has more distortion in the bass frequencies. Higher distortion due to the woofer motor design could cause the perception of fuller bass. The SEAS woofer has very low distortion and will sound leaner as a result.
-David
Bass/low midrange is impossible to compare accurately without both sets of speakers in the same room. The room totally dominates at these frequencies.
See if the dealer will let you bring in your SR71's and do a side by side comparison.
See if the dealer will let you bring in your SR71's and do a side by side comparison.
ppchiu said:
Hi,
I have an MTM version of this speaker. I found it to sound very good initially, but with a slight reservation that it sounded like an excellent speaker but half 'run in'.
I think you are hearing most of the good points of this speaker but with a similar reservation?
Anyway, after a few weeks of running in (just by normal use) it really came good and is an exceptional speaker. So I suggest you just keep running it for another month, perhaps two, before trying any comparisons. From my experience, I suggest it *will* come good.
ppchiu said:
Hi ppchiu,
I can only say that an MTM using these drivers works extremely well with my 7 watt 300B SET. I guess you don't want to know that now, as you've built the normal TM version.
But if you're not sure about the sound with the SET amp, you could try the MTM. I'll gladly send design details, and a similar project is on Jay's web site.
Note that the crossover and bass alignment were designed using the (high) output impedance of my SET amp. I suggest that this is essential in order to get the best results.
ppchiu said:
If you want to email me, I can draw up the x-o diagram I am using.
It is a quite different x-o from Zaph's.
ppchiu said:
Do you get everything from Madisound? If yes, could you tell me how much you paid on shipping (and handling if any). I tried to get a quote from partsexpress for their kit, and the shipping will cost me over $200.
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