I've used a similar woofer to these - DVC version, but the parameters are similar. They're pretty good for the size and cost, so, IMO, give them a go - mine responded well to a sealed box with LT.
Hi,
FYI, It looks like the Zalytron drivers perform well in a T-TQWT too, if my T/S parameters is ok, of course.
b
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OK, let's just say I'm going with the 830668 Peerless.
I'm not that good with gisting TS specs yet. This driver is referred to as being optimized for sealed designs.
Znom 8 ohm
Re 5.6 ohm
Le 3.3 mH
fs 33.3 Hz
Qms 4.85
Qes 0.57
Qts 0.51
Mms 51.1 g
Cms 0.45 mm/N
Sd 335 cm2
BL 10.2 N/A
Vas 69.3 ltrs
Xmax 8 mm peak
Voice Coil Ø 39 mm
Sensitivity
2.83V / 1m 88.7 dB
Power (IEC) W
Magnet weight 0.87 kg
Suggested box alignment:
1.5 to 2.75 cubic feet sealed, with stuffing. F3 47Hz to 46Hz.
How much does that suggest that they are "limited" to sealed designs? If I decide that a sealed 2.75 box just isn't doing it for me at some point, are these going to perform well in a vented box?
And, while I'm here... Can anyone give a few pointers on using Winisd for basic box calculations? There are a few fields, xmax for instance, where you would expect to type a 'mm' value, but there is an 'm' next to the box. Does this mean the field wants meters? Does 8mm xmax need to be typed in as .008?
chilli555 you should check out halfbakery.com
you have a baker's 'sense' of humor
I'm not that good with gisting TS specs yet. This driver is referred to as being optimized for sealed designs.
Znom 8 ohm
Re 5.6 ohm
Le 3.3 mH
fs 33.3 Hz
Qms 4.85
Qes 0.57
Qts 0.51
Mms 51.1 g
Cms 0.45 mm/N
Sd 335 cm2
BL 10.2 N/A
Vas 69.3 ltrs
Xmax 8 mm peak
Voice Coil Ø 39 mm
Sensitivity
2.83V / 1m 88.7 dB
Power (IEC) W
Magnet weight 0.87 kg
Suggested box alignment:
1.5 to 2.75 cubic feet sealed, with stuffing. F3 47Hz to 46Hz.
How much does that suggest that they are "limited" to sealed designs? If I decide that a sealed 2.75 box just isn't doing it for me at some point, are these going to perform well in a vented box?
And, while I'm here... Can anyone give a few pointers on using Winisd for basic box calculations? There are a few fields, xmax for instance, where you would expect to type a 'mm' value, but there is an 'm' next to the box. Does this mean the field wants meters? Does 8mm xmax need to be typed in as .008?
chilli555 you should check out halfbakery.com
you have a baker's 'sense' of humor
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HI,
IMO, You are pointing at a driver not well suited for a ported box unless the driver seen Qt is less than about 0.65 or if an aperiodic box is designed.
Here is a T-TQWT design I believe is ‘musical’ if properly stuffed and if placed next to a wall: See the first picture.
If Peerless 830668 is put into about 2.75 cubic feet ported box: See the second picture.
b
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