T-08-02-10

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Home Automation - Audio

Everything from background music to high volume party.

Amplifier

Realistically the power amp will need to be in a separate box because amplifiers tend to be multi-channel. Also sometimes preamp filters are separate. Typically the units are 19" rack mount. Make the box the same 3' 7-1/2" from finished floor height with castors, but only 22" wide. Speaker wires are not a big problem and not too expensive.

A typical 2 channel amp would be...

BehringerNX3000D-DSP

Behringer NX3000D Ultra Lightweight Class D 3000W Power Amplifier with DSP

https://www.parts-express.com/behringer-nx3000d-ultra-lightweight-class-d-3000w-power-amplifier-with-dsp--248-7013 $349.99

Behringer NX6000D with DSP

Behringer NX6000D Ultra Lightweight Class D 6000W Power Amplifier with DSP

https://www.parts-express.com/behringer-nx6000d-ultra-lightweight-class-d-6000w-power-amplifier-with-dsp--248-7017 $549

https://www.parts-express.com/pedocs/brochures/248-7017--Behringer-NX6000D-Product%20Information.pdf

https://www.parts-express.com/pedocs/manuals/248-7017--Behringer-NX6000D-Manual.pdf

If you don't need quite as much power (or just to have a backup amp if case the primary amp fails) then the following is a good choice (and only $75)...

Backup mixer amplifier

It also has a mic input with reverb.

Party Equipment 06

Speakers

Subwoofers

Use 18" speaker drivers. Get 8ohm versions so that in the future you can put two in parallel on each channels to make 4 ohms.

Speaker Rockville 18in

Rockville RVW1800P8 1800w 18" Raw DJ Subwoofer 8 Ohm Sub Woofer 107OZ Magnet

https://www.ebay.com/itm/301485449794 $72.95 no tax or shipping

https://smile.amazon.com/gp/product/B01DP0HKJK/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER $77.62

These are typical of what people used to buy before the advent of decent Chinese speakers (as referenced above)...

https://www.loudspeakersplus.com/18-Sound-18LW2400-Subwoofer-Speaker-p/18-sound-18lw2400.htm $299

Tweeters

Tweeters Pyle 1400W

Pyle PDBT78

Die Cast Aluminum FrameDiamond Chrome Cutting Finish 2'' High Temperature Kapton Voice Coil 20oz Magnet Structure 350 Watts RMS/700 Watts Peak 4-8 Ohms Impedance Sensitivity: 112 dB/W/M Frequency Response: 2kHz - 25kHz Mylar Crossover Capacitor Included Dimensions: 4'' x 5'' / 3'' Mounting Depth

PYLE PRO PDBT78 2" 700 Watt Super Titanium Bullet Horn DJ Audio Tweeters

https://www.ebay.com/itm/352058635547 $29.69 each - no tax or shipping

https://smile.amazon.com/gp/product/B00I3LGP5W/ref=ox_sc_act_title_3?smid=A1DXN92KCKEQV4&psc=1#customerReviews $59.99 for two

Pyle PDBT78 2-Inch Titanium Super Tweeter

https://smile.amazon.com/Pyle-PDBT78-2-Inch-Titanium-Tweeter/dp/B000JLBO6E/ref=pd_sim_107_19?_encoding=UTF8&pd_rd_i=B000JLBO6E&pd_rd_r=N61NAHZT2H6VTDBY5YV1&pd_rd_w=ik759&pd_rd_wg=cOhkp&psc=1&refRID=N61NAHZT2H6VTDBY5YV1 $32.19 for 1

https://www.pyleusa.com/2-titanium-super-tweeter-917.html

http://manuals.pyleusa.com/PDF/PDBT78.pdf

Use four on each channel with them arranged in an arc. Have two in series and then put each pair in parallel to make the total 8 ohms.

Crossover

625hz & 5khz crossover points

W is low frequency (Woofer), T is mid range, H is high frequency (Tweeter).

Subwoofer cabinets

Speaker Cabinet Front Folded Horn

The following only applies to bass speakers. You also need midrange and tweeters but these are best positioned above head height angled slightly downwards because high frequencies are absorbed by soft furnishings and human bodies.

Above finished floor height the height of the top of the bass speaker is 3' 7-1/2". Construct from 2-by lumber to give it lots of mass. Use folded horn design. It's all about the bass.

Do not be tempted to turn the horn the other way up because things may get "posted" through the slot and land in the bottom.

Provide casters but allow for an optional felt padded plinth to use instead of wheels as that will give more bass transmission to the floor.

http://www.speakerplans.com/index.php?id=186horn

Speaker Drawing Folded Horn

Speaker sockets

The speakON panel mount connectors are the standard chassis connectors for loudspeaker / amplifier interconnections. They feature a unique metal locking system, making contact only once fully locked. The speakON receptacles are robust, versatile and easy to terminate. The chassis connectors are airtight for audio applications (leakage 30 cm3/s at 10 kPa differential pressure).

Countersunk mounting holes to accept M3 bolts.

http://www.neutrik.com/en/speakon/speakon-chassis-connectors/speakon-chassis-connectors/

Speakon NL4MPR 4 Pin http://www.neutrik.com/en/speakon/speakon-chassis-connectors/nl4mpr

Black round G-size flange, countersunk thru holes, 3/16" flat tabs

Current rating 40 A rms.

Need to buy high quality connectors.

Buy genuine neutrik connectors.

Speakon Big Round Sockets