Log in
Register
Home
Forums
New posts
Search forums
What's new
Featured content
New posts
New profile posts
Latest activity
News
Members
Current visitors
New profile posts
Search profile posts
Features
Log in
Register
What's new
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Menu
Install the app
Install
Reply to thread
Home
Forums
Pro Audio
Junior Varsity
how to hook this horn up?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="Timo Ulkuniemi" data-source="post: 130968" data-attributes="member: 1978"><p>Re: how to hook this horn up?</p><p></p><p>HELLO</p><p></p><p>NOW we have a starting point.</p><p></p><p>Impedance of such horns is usually quite high - a 50W horn on 50V line has impedance of 50ohms - so you could connect 6 horns parallel using just about any old wire - naturally heavier is better, but these things work with almost anything... 6 horns parallel would be 8.3ohms / 300W - so 2x150W@4ohms amp would be enough - although as usually - the bigger the better ( as long operator is sane...)</p><p></p><p>Now horn connection is nice in that you do not have to calculate impedances - as long they all are using same voltage, just add their powers up - so you can use 50W 30W 10W and even 2W simply connecting them parallel - as long you do not exeed the amplifiers capacity</p><p></p><p>If those speakers operate @ 70 V line, then they have higher impedance - at 100V it is still higher</p><p></p><p>To determine wich voltage your amp is capable driving " VOLTAGE = square root of ( POWER multiplied by IMPEDANCE ) " in case of 2x150W@4ohm = 1x300W@8ohm bridged we get square root of 2400 = 48,99V = close enough for nominal 50V line. 2x300W@4ohms = 600W8ohms - sqr of 4800 is 69,3V - and finally dual 600W@4ohm amp is capable of providing 100V line</p><p></p><p>Naturally you could drive 100V horn with ten watt mono amp, but then you would only get some 6volts to it... very quiet</p><p></p><p>So find out how many horns you are going to use and the voltage they use - naturally you can use bigger amps - easier on them amps, of course - </p><p></p><p>City block is what - about 150 yards - try to get them horns - about a dozen - really high - some ten meters/yards/ 33ft should be great - point them down to victims - fire away.</p><p></p><p>Do not expect any hifi - but right adjusted - speech clarity and announcements can be quite satisfactory - low cut 200-400Hz - depending of your horns</p><p></p><p></p><p>We did once an esplanade party with speakers podium in center and speakers all along up two 200 meters both direction - we aimed all speakers away from center to avoid situation, where folks hear same sound from front and back - luckily we had enogh amps and delays, so we could set time sync for them, too.</p><p></p><p>If you only have one amp - your choices might be one cluster in the middle of block high as you reasonably can - pointing along street both ways - or then distribute them evenly along block - aiming them from streetside across to othe side - here too higher is better ( of course if it is in Manhattan, there is possibility hanging them way too high... ).</p><p></p><p></p><p></p><p>There is this wonderful book - you might find it in your library - Sound System Engineering by Don & Carolyn Davis - Howard W. Sams&Co </p><p>- pages 331-341 gives you idea of speaker density = how many speakers you should use</p><p>- pages 401-405 give you math cocerning amps etc</p><p></p><p>That book has lots of other very useful information - along with mathematics.</p><p></p><p></p><p>After all this - please inform us afterwards how your street party turned out.</p><p></p><p>Have fun</p></blockquote><p></p>
[QUOTE="Timo Ulkuniemi, post: 130968, member: 1978"] Re: how to hook this horn up? HELLO NOW we have a starting point. Impedance of such horns is usually quite high - a 50W horn on 50V line has impedance of 50ohms - so you could connect 6 horns parallel using just about any old wire - naturally heavier is better, but these things work with almost anything... 6 horns parallel would be 8.3ohms / 300W - so 2x150W@4ohms amp would be enough - although as usually - the bigger the better ( as long operator is sane...) Now horn connection is nice in that you do not have to calculate impedances - as long they all are using same voltage, just add their powers up - so you can use 50W 30W 10W and even 2W simply connecting them parallel - as long you do not exeed the amplifiers capacity If those speakers operate @ 70 V line, then they have higher impedance - at 100V it is still higher To determine wich voltage your amp is capable driving " VOLTAGE = square root of ( POWER multiplied by IMPEDANCE ) " in case of 2x150W@4ohm = 1x300W@8ohm bridged we get square root of 2400 = 48,99V = close enough for nominal 50V line. 2x300W@4ohms = 600W8ohms - sqr of 4800 is 69,3V - and finally dual 600W@4ohm amp is capable of providing 100V line Naturally you could drive 100V horn with ten watt mono amp, but then you would only get some 6volts to it... very quiet So find out how many horns you are going to use and the voltage they use - naturally you can use bigger amps - easier on them amps, of course - City block is what - about 150 yards - try to get them horns - about a dozen - really high - some ten meters/yards/ 33ft should be great - point them down to victims - fire away. Do not expect any hifi - but right adjusted - speech clarity and announcements can be quite satisfactory - low cut 200-400Hz - depending of your horns We did once an esplanade party with speakers podium in center and speakers all along up two 200 meters both direction - we aimed all speakers away from center to avoid situation, where folks hear same sound from front and back - luckily we had enogh amps and delays, so we could set time sync for them, too. If you only have one amp - your choices might be one cluster in the middle of block high as you reasonably can - pointing along street both ways - or then distribute them evenly along block - aiming them from streetside across to othe side - here too higher is better ( of course if it is in Manhattan, there is possibility hanging them way too high... ). There is this wonderful book - you might find it in your library - Sound System Engineering by Don & Carolyn Davis - Howard W. Sams&Co - pages 331-341 gives you idea of speaker density = how many speakers you should use - pages 401-405 give you math cocerning amps etc That book has lots of other very useful information - along with mathematics. After all this - please inform us afterwards how your street party turned out. Have fun [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Junior Varsity
how to hook this horn up?
Top
Bottom
Sign-up
or
log in
to join the discussion today!
