Building Audiophile Sub with Peerless's XXLS 830845

[bjorno]

4(5)

 

[bjorno]

5(5)

 

[Tiff_Needle]

I would Like to know if anyone can help e with the LT circuit for this specific sub (Peerless 12" xxls - 830845) with th Ruthmik Audio A370 Plate amp?

I'm considering on purchasing rithmyk's plate amp and chaging it's RC values to achieve a better set for my sub.

I've made some plots and I've come up with a 110,6 L sealed box!

Is'nt it a box too big?

Hi There again!

Wath would be the LT circuit values that you would recomend if I where to use the 12" XXLS - 830845 Driver with the Rythmik Audio A370 Plate amp?

Peerless specs (http://www.tymphany.com/datasheet/printview.php?id=30):

Electrical Data

Nominal impedance
Zn
8
ohm

Minimum impedance
Zmin
6.7
ohm

Maximum impedance
Zo
126.7
ohm

DC resistance
Re
5.9
ohm

Voice coil inductance
Le
3.6
mH

Capacitor in series with x ohm
Cc
--
uF

T-S Parameters

Resonance Frequency
fs
21.5
Hz

Mechanical Q factor
Qms
9.68


Electrical Q factor
Qes
0.47


Total Q factor
Qts
0.45


Force factor
Bl
13.1
Tm

Mechanical resistance
Rms
1.41
Kg/s

Moving mass
Mms
101.4
g

Suspension compliance
Cms
0.54
mm/N

Effective cone diameter
D
24.4
cm

Effective piston area
Sd
466
cm2

Equivalent volume
Vas
162.5
ltrs

Sensitivity (2.83V/1m)

88
dB

Ratio BL/�ã(Re)

5.4


Ratio fs/Qts
F
48



Power handling

100h RMS noise test (IEC)
175
W

Long-term Max Power (IEC 18.3)
350
W

Max linear SPL (rms) @ power
--
dB/W

Short Term Max power (IEC 18.2)
--
W

Voice Coil and Magnet Parameters

Voice coil diameter
51
mm

Voice coil height
33
mm

Voice coil layers
4


Height of the gap
8
mm

Linear excursion +/-
12.5
mm

Max mech. excursion +/-
--
mm

Flux density of gap
--
mWb

Total useful flux
2.3
mWb

Diameter of magnet
147
mm

Height of magnet
35
mm

Weight of magnet
2.4
Kg


Rythmik Audio A370 Plate amp specs:


http://www.rythmikaudio.com/nonservo_product.htm#350se


Please take a look at the attachements

 

[Tiff_Needle]

Sorry for the last post!

I did not notice that there where more replys on other pages!

I have to examine carefully all your replys and then post some questions.

Thank You all for your help.

I will keep you posted!

Cheers,

TIFF😀

 

[Tiff_Needle]

Hi there once again,

I've been out of the project for quite some time now since I've been working abroad.

I've read your replies and thank you all for your contribution.

I would like to take this opportunity to ask your opinion regarding the amplifier module that you would recommend.

I've been looking for a amplifier preferably with a XLR input and with a power reserve good enough in case I choose in the near future to go with a 2 subwoofer configuration.

I've looked in to the following choices:

*Hypex's DS8.0
*BK electronic's BSBPV500
and
*Rythmik Audio A370 amplifier - Special Edition (Non-servo)

all three of them are very different.

I prefer a more "musical" amplifier that's wy I'm considering a class A/B operation instead of a class D since I haven't got any actual listening experience with class D operation amplifiers.

I've listened once to digital amplifier's from lyngorf and they were ok but it wasn't the kind of musicality that search for.

Maybe today thing might have change a lot...

I've been told great things regarding Hypex amplifiers and the all well renowned BK amplifiers.

What are your opinions?

Cheers,

Tiff

 

[Tiff_Needle]

does anyone have an opinion on the amplifiers I'm considering?

 

[jb74]

Speaker Identity

Tiff_Needle -

For what it's worth - the speaker photo in your post #1 appears
to be a Peerless 830877 12" XXLS Autosound Subwoofer

 

[Tiff_Needle]

yes that is correct!

At the time I didn't have a photo of the peerless 830845 subwoofer but since they look almost the same I've posted one of the automotive model.

I've got both.. 1x 830845 and 2x 830777!

Got any opinion regarding my last question?

Cheers,

TIFF

 

[jb74]

Tiff_Needle

I have no experience with the amplifiers
mentioned in your post 25

But since your posted photo and your written
description did not match, I thought there was
a slight chance that you had a mislabeled product.

(I have on two occasions been shipped a speaker of that type that was not what it was labeled - from a well known US dealer)

Mistakes can happen.

 

[cowanaudio]

G'day Tiff

Those 830877 drivers are excellent in a 20Hz Tapped Horn. Try running some models in Horn Response. You couldn't ask for more in a domestic environment!

Cheers

William Cowan

 

[Tiff_Needle]

Hi there,

You might be correct but I no nothing regarding Tapped Horns!

Do you have some documentation about the subject or any sujestiong regarding my 2x 830877??

Cheers,

Tiff

 

[cowanaudio]

G'day Tiff

Have a look for posts by me in the Tapped Horn thread on this site. A Tapped Horn will give you all the advantages of these great drivers, with even lower distortion and >10dB more maximum output. The '877 is pretty much the ideal driver for one of these Tapped Horns, when you aim for ~20Hz cut off.

Cheers

William Cowan

 

[Tiff_Needle]

Do you have a link regarding this subject?

I've been searching on the site but I haven't seen any specific layout for this driver @ 20Hz!

Just curious... can the horn stand horizontaly?