PAS loudspeakers any good?

Status
Not open for further replies.
OMNIFEX said:
I currently have the 2880 C
:bigeyes: Wow!

The 2580C is big enough for me! anyway, in a 6th order bandpass box it seems to tune up better. I am throwing away lots of sensitivity though. From 99dB down to 87dB. :bawling: I console myself with the fact that most people live with this kind of sensitivity quite happily.
 

Attachments

  • pas sub.png
    pas sub.png
    10.3 KB · Views: 395
I had a pair of 15s some years ago.

They sounded good to me, but I really did not do any extended measurement with them. All I wanted was a PA woofer to play damn loud in my home, and they did that.

I called up their tech support, and they were always very courteous.

So I would buy them again, but in truth, all I can verify is that they worked as a PA speaker should.

One issue is cone excursion. PA speakers have a small linear cone excursion compared to something like, say, the Tempest. They did seem to have a rather large mechanical excursion, which I tested because I ran them off a turntable without a rumble filter, lol. :cannotbe:

The best way to find an Australian agent, if one exists, would be simply to call the company. PAS is not one of the better known brands even here in America.
 
kelticwizard said:
PAS is not one of the better known brands even here in America.

I Agree

I remember picking up a Beyma 18 LX 60 for $100,
and, the 18 G 550 for $200 on Ebay a year ago.
Brand New, I might add. Just because no one knew
what they were.

If it was JBL 2441 or EV 180B, the bid would've closed at $300
 
OMNIFEX said:
So, what's the TS Parameters of the 2580 C?

[Driver]
Brand=
Model=PAS HL-2580C
Manufacturer=PAS
ProvidedBy=Administrator
Comment=
DateAdded=20031216
DateModified=20031216
Qts=0.24
Znom=8
Fs=35
Pe=500
SPL=99
Re=5.9
Le=0.0017
fLe=0
KLe=0
BL=24.26366
Xmax=0.0064
Cms=0.0001852
Qms=9.4
Qes=0.246
Rms=2.61137
Mms=0.1116
Sd=0.079
Vas=0.164
Dia=0
Vd=0.000506
no=0.027798
Dd=0.3172
EBP=142.11
numVC=1
Hc=0.0195
Hg=0.0105
SPLmax=120.58
SPLmaxLF=94.64
USPL=97.92
alfaVC=0
Rt=0
Ct=0
gamma=217.37442
Rme=99.78397
Mpow=9.98919
Mcost=195.1
Gloss=0.031684
c=343.68
roo=1.20095
Thick=0
Depth=0
MagDepth=0
Magnet=0
Basket=0
Outer=0
Vcd=0
DVol=0
Posting laziness = high.
 
kelticwizard said:


A) Is upping the amplifier output impedance a good idea?
B) Are you going to do this using tubes or transistors?
C) How are you going to do this?

a) As a random thing to do, no. But if it raises the Qts to a more suitable figure of 0.5 then yes, I think so.

b) Initially a pair of LM3875's that I am already using as a sub amp.

c) see diagram. Instead of returning the - input of the amp to ground as usual, put it to the top of the current sense resistor. For a given output voltage, if the positive-going load current increases then the top of the sense resistor goes a little positive. This voltage is fed into the - input of the amp via the 10k resistor and amplified x22. This causes the output voltage to droop a bit with the increased output current, just as if there was a resistor in series with the output. The output impedance can be varied by altering the amount of current-sense resistor voltage fed back into the amp.

Of course, I havent actually built one yet... 🙄
 

Attachments

  • current amp.png
    current amp.png
    2.6 KB · Views: 146
Status
Not open for further replies.