ENGL E840 User manual

E840

Tube Poweramp 50/50

Operator´s Manual

In addition to a first class tube tone, the 840 poweramp offers a number of practical features in a powerful 2x50 watt package. Each of the two stereo channels features two volume and two presence controls (A and B), so you can dial in diverse volume and presence settings. The A/B controls are switchable via an external footswitch or through MIDI commands via a MIDI Switcher. Intelligent design features, superior craftsmanship and finishing and quality components are what this device is all about. However keep in mind, that a few precautions will radically extend tube life (see handling and care guidness). The entire Team would like to thank you for your faith in our product; we hope you derive a great deal of joy and satisfaction from your TUBE POWERAMP 840.

PLEASE NOTE: Read the Operator's Manual carefully and thoroughly, especially the Handling and Care section as well as the guidelines in bold-face type. Avoid Operating errors and potential damage to the amp by heeding the guidelines and cautionary remarks in this manual. The footnotes also cover a few convenient pointers and interesting tips on several functions. These are listed below.

T	I	P	1
T	I	P	2
T	I	P	3

T	I	P	4

T	I	P	5

The VOLUME A/B switching feature can be used for the following application: In combination with a multi channel preamp, to activate two different volumes for each channel, for instance one for rhythm work, the other for soloing.

The PRESENCE A/B switching feature can be used for the following application: In combination with a two-channel preamp (Clean/Lead) a possible option could be a setting of 1 to 4 o´clock for the PRESENCE A controls and a setting of 8 to 12 o´clock for the PRESENCE B controls. Use PRESENCE A when the preamp is in the clean mode, and PRESENCE B for lead tones.

The two functions VOLUME A/B and PRESENCE A/B can also be switched via the ENGL MIDI Switcher Z- 11. Simply connect the 1/4" stereo jack (23) to the stereo input of the Switcher via a cable equipped with 1/4" stereo plugs. You can control these switching functions via the buttons on the Switcher. The respective functions (e, g. Volume B and Presence A) are saved to the desired MIDI program locations. The ENGL MIDI Footswitch Z-12 is ideal for activating MIDI programs. When used in conjunction with the ENGL MIDI Switcher Z-11, this durable footswitch does not require a separate AC power pack. The requisite power is routed via the MIDI cable.

This poweramp is designed for one speaker cabinet per channel. If you decide to connect additional speakers, ensure you keep the overall impedance in mind! For instance, if you want to connect two 8Z systems per side, you must first connect them in series and then to the amp's 16Z outputs.

If you are using a stereo speaker cabinet for both channels, ensure it actually operates in the stereo mode, otherwise you may damage the power amp. A convincing stereo image is achieved via a quality stereo effects processor and a separate speaker for each channel.

For a very compact setup we recommend the ENGL speaker cabinets E112 (loaded with one 12" Vintage speaker; wide open panoramic sound with a punchy bottom and crisp high) or the E210" cabinet (loaded with two 10" Vintage speakers; nicely balanced, warm tone with a burly midrange). To achieve enormous bottom end, we recommend our flagship cabinets, the E212 and the E412.

Use this switch to silence (0 position) the amp when you take a lengthier break. The amp's tubes stay warm, which means that it is ready to roll immediately when you switch it back to full power. The standby switch is also well-suited for muting the amp for brief breaks, for instance when you're switching guitars. If you choose to use just one power amp channel, ensure you switch the other channel's STANDBY switch off. Never operate an active stereo channel without a connected speaker, you may destroy the power amp!

FRONT

	TUBE POWERAMP 840/50													R
	GAIN	LEFT A	LEFT B	A / B	RIGHT A	RIGHT B	LEFT A	LEFT B	A / B	RIGHT A	RIGHT B	LEFT	RIGHT
				VOLUME				PRESENCE				STAND BY		POWER
	1	2	3	4	5	6	7	8	9	10	11	12	13	14
1	GAIN								8	PRESENCE LEFT B

		2
T	I	P	1
		3
T	I	P	1
		4
T	I	P	3

		5
T	I	P	1
		6
T	I	P	1
		7
T	I	P	2

Power amps' input sensitivity. This button increases the gain level for both channels at the INPUT jacks (24) and (25).

VOLUME LEFT A

volume control A for the left power amp. This control is active if button A/B is in the off position; LED does not illuminate.

VOLUME LEFT B

volume control B for the left power amp. This control is active if button A/B is in the on position (depressed); LED illuminates.

A/B VOLUME

switches between VOLUME A controls and VOLUME B controls.

1.A/B button position off: VOLUME A

2.A/B button position on: VOLUME B, indicated by the red LED.

This feature can also be switched via a footswitch connected to jack 23;

the VOLUME A/B pushbutton is deactivated once a footswitch is connected.

VOLUME RIGHT A

volume control A for the right power amp. This control is active if button A/B is in the off position; LED is not illuminating.

VOLUME RIGHT B

volume control B for the right power amp. This control is active if button A/B is in the on position (depressed); LED is illuminating.

PRESENCE LEFT A

Treble control A for the left poweramp channel; it is active if button A/B (9) is in the off position; LED is not illuminating.

			P	2	Treble control B for the left poweramp
	T	I			channel; it is active if button A/B (9) is in the
					on position; LED is illuminating.

			9		A/B PRESENCE
			P	3	switches between PRESENCE A controls and
	T	I			PRESENCE B controls.
					1. A/B button position off: PRESENCE A
					2. A/B button position on: PRESENCE B,
					indicated by the red LED.
					This feature can also be switched via a
					footswitch connected to jack 23;
					the PRESENCE A/B pushbutton is
					deactivated once a footswitch is connected.

			10 PRESENCE RIGHT A
			P	2	Treble control A for the right poweramp
	T	I			channel; it is active if button A/B (9) is in the
					off position; LED is not illuminating.
			11 PRESENCE RIGHT B
			P	2	Treble control B for the right poweramp
	T	I			channel; it is active if button A/B (9) is in the
					on position; LED is illuminating.
			12 STANDBY LEFT
			P	5	left channel standby.
	T	I
			13 STANDBY RIGHT
					right channel standby.
	T	I	P	5

14 POWER

AC power on/off.