In-wall crossover help

[jszmgpolk]

I am going to be building inwall surrounds for my theater setup. I will be using the following components in a 2-way design. I need help in designing a crossover and was wondering if someone could help. These will only be used for surround speakers only. Also I am open to different components and want to limit my budget to around $200-300.

Dayton Audio DC28F-8 1-1/8" Silk Dome Tweeter
Part # 275-070
Resonant Frequency (Fs)637.2 Hz
DC Resistance (Re)5.50 ohms
Voice Coil Inductance (Le)0.09 mH
Mechanical Q (Qms)0.82
Electromagnetic Q (Qes)0.90
Total Q (Qts)0.43




Dayton Audio ND140-4 5-1/4" Aluminum Cone Midbass Driver 4 Ohm
Part # 290-216
Resonant Frequency (Fs)54 Hz
DC Resistance (Re)3.7 ohms
Voice Coil Inductance (Le)0.72 mH
Mechanical Q (Qms)6.59
Electromagnetic Q (Qes)0.74
Total Q (Qts)0.66
Compliance Equivalent Volume (Vas)0.36 ft.³
Mechanical Compliance of Suspension (Cms)0.97 mm/N
BL Product (BL)3.9 Tm
Diaphragm Mass Inc. Airload (Mms)9g
Maximum Linear Excursion (Xmax)4 mm
Surface Area of Cone (Sd)86.6 cm²

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[Paul W]

Can't help with the xo, but a 5" woofer with 4mm xmax is too small, even in surrounds. Consider the RS-180 as it is in the same price range.

[---k---]

I disagree.
The Ochocinco uses the ND140 in a MTM and TM size. They are wonderful little drivers. I have pair of the TM and really enjoy them. Fed enough power, they can fill my small living room. be My brother uses the TM as wall mounted surrounds and they work great.

I agree that a bigger driver would be better, but consider the ND140 is pretty easy to work with.

[JonMarsh]

I am going to be building inwall surrounds for my theater setup. I will be using the following components in a 2-way design. I need help in designing a crossover and was wondering if someone could help. These will only be used for surround speakers only. Also I am open to different components and want to limit my budget to around $200-300.

Dayton Audio DC28F-8 1-1/8" Silk Dome Tweeter
Part # 275-070
Resonant Frequency (Fs)637.2 Hz
DC Resistance (Re)5.50 ohms
Voice Coil Inductance (Le)0.09 mH
Mechanical Q (Qms)0.82
Electromagnetic Q (Qes)0.90
Total Q (Qts)0.43




Dayton Audio ND140-4 5-1/4" Aluminum Cone Midbass Driver 4 Ohm
Part # 290-216
Resonant Frequency (Fs)54 Hz
DC Resistance (Re)3.7 ohms
Voice Coil Inductance (Le)0.72 mH
Mechanical Q (Qms)6.59
Electromagnetic Q (Qes)0.74
Total Q (Qts)0.66
Compliance Equivalent Volume (Vas)0.36 ft.³
Mechanical Compliance of Suspension (Cms)0.97 mm/N
BL Product (BL)3.9 Tm
Diaphragm Mass Inc. Airload (Mms)9g
Maximum Linear Excursion (Xmax)4 mm
Surface Area of Cone (Sd)86.6 cm²

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Do you have FRD and ZMA files for these drivers mounted as you intend, or traced from public info? That would make it a lot easier for anyone to help you.