Goldwood GW-215 open baffle

[tonytex]

Much has been said about the GW-1858 as good OB woofers , but what about the GW-215/4 , they look pretty interesting and seem to have good specs for an H-frame OB matched to a 3" or 4" Full range
Anyone have experience with them?
Please can someone suggest an H-Frame for it?
Thank you

[LineSource]

Hi tonytex,

I have not used this speaker but have listened to Carver dipoles with a similar high Qts ~ 2 and thought that the bass was sloppy and undetailed. For an H-baffle I favor a Qts between 0.7 and 0.8, since the motor still is strong enough to have good control of the cone motion. The air mass loading of the H-frame will slightly increase Qt. I think you would get noticably better bass from the GW-1858. It would be safest to copy one of GM's documented and reviewed designs from quaterwave.com. Just accept the larger H-baffle.

In the USA, the Acoustic Elegance IB15 speaker looks like a very good dipole choice for $125-$150. The efficiency is low at 87 db, and two IB15s are often wired in parallel and run from a plate amp.


FROM PARTS EXPRESS GW 215:
These low frequency OEM drivers are ideal for the customer who is looking for inexpensive replacement woofers. Each woofer features a treated paper ribbed cone, vented pole piece, moisture resistant poly foam surround, and stamped steel frame. Specifications:*Power handling: 135 watts RMS/250 watts max *Voice coil diameter: 1-1/2" *Le: .9 mH *Re: 7.1 ohms *Frequency response: 27-1,200 Hz *Magnet weight: 20 oz. *Fs: 29 Hz *SPL: 87.8 dB 1W/1m *Vas: 12.95 cu. ft. *Qms: 7.08 *Qes: 2.69 *Qts: 1.95 *Xmax: 3.5mm *Dimensions: A: 15" B: 13-3/4" C: 5-3/16" *Net weight: 5 lbs.


Acoustic Elegance
IB15
Fs: 16Hz
Qms: 6.8
Vas: 439L
Cms: .45mm/N
Mms: 220g
Rms: 3.239
Xmax: 18.5mm
Xmech: 25mm
Sd: 830sqcm
Vd: 3.07L (p-p)
Qes: .78
Re: 5.5ohm
Le: .33mH
Bl:12.49
Pe: 500W
Qts: .7
1WSPL: 86dB
2.83V: 87.3dB

Physical dimensions:
Cutout hole: 14"
Outer diameter: 15.5"
Mounting Depth: 7.5"
Overall Depth: 8"
Weight: 19lbs