Electro-Voice SL6.2M Troubleshooting Table, Secure the Seismic Tab Connection Point

Attach both logo caps as shown in Figure 8 after tightening and securing the speaker.

EV logo cap	EV logo cap
(large)	(small)

Step 4: Secure the Seismic Tab Connection Point

The rear of the enclosure includes an eye- bolt for connection to a seismic restraint. Connect it to a properly rated hardware fit- ting that is securely installed independent- ly of the SAM™ bracket. Even if your local construction code does not require the installation of secondary support, its use is highly recommended for further security.

Troubleshooting Table

Problem	Possible Cause(s)	Action
1. No sound	Amplifier	Connect a known working test speaker to the amplifier
		outputs. If there is no sound, check that all the elec-
		tronics are on, the signal routing is correct, the source
		is active, the volume is turned up, and so on. Correct/
		repair/replace as necessary. If there is sound, the
		problem is in the wiring.
	Wiring	Verify that you have connected the correct wire pairs to
		the amplifier. Play something at low level through the
		amplifier (for example, from a CD player or tuner).
		Connect the test speaker in parallel with the malfunc-
		tioning line. If the sound has gone or is very weak, the
		line has a short in it (possibly a severe scrape, pinch,
		or staple puncture). If the sound level is normal, the
		wire is open (possibly a cut wire or a missed connec-
		tion). Using the test speaker, move down the line and
		test each connection/junction until you find the problem
		and correct it. Observe proper polarity.

Figure 8: Attach logo caps

Step 3: Wire the Speaker

Connect the wires to the speaker at the back terminal plate observing the polarity of the connections. The push-terminals accept banana connector plugs.

Connect seismic security cable

Figure 9: Secure seismic security cable

Step 5: Test System Operation

After all connections are made, test the complete system operation. The Trouble- shooting Table on the next page will assist in locating many speaker-related problems.

2. Poor low-	Speakers wired	When two speakers are connected out of polarity
frequency	out-of-polarity	(out of phase), the low frequencies will cancel each
response		other acoustically. Carefully observe the wire markings
		or tracers on your speaker wires. Verify that the ampli-
		fier (+) terminal is connected to the red speaker termi-
		nals and the amplifier (–) terminal is connected to all
		the black speaker terminals.
	Improperly wired	Using a test speaker as described above, verify that
	subwoofer panel	all amplifier and speaker wires are connected to their
		proper terminals with the correct polarity. Reversing
		just one set of amplifier wires can cut out all bass
		output from the subwoofer.
3. Intermittent output Faulty connection		Check all connections at amplifier and speakers to
such as crackling		ensure they are clean and tight. If the problem persists,
or distortion		it may be in the amplifier or wiring. See no. 1 above.
4. Constant noise	Defective amplifier	If the noise is present but no program material is
such as buzzing,	or other electronic	playing, the likely cause is the signal chain in the elec-
hissing, humming	device	tronics. Evaluate each component as necessary to iso-
		late the problem.
	Poor system	Check and correct the system grounding, as required.
	grounding or
	ground loop

If these suggestions do not solve your problem, contact your nearest Electro-Voice dealer or Electro-Voice distributor.