Go to page of
A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JAMO D 4, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of JAMO D 4 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of JAMO D 4. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of JAMO D 4 should contain:
- informations concerning technical data of JAMO D 4
- name of the manufacturer and a year of construction of the JAMO D 4 item
- rules of operation, control and maintenance of the JAMO D 4 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of JAMO D 4 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of JAMO D 4, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JAMO service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of JAMO D 4.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JAMO D 4 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
-
Page 1
Technical Description Jamo D 4 Concept[...]
-
Page 2
2 Technical Description Jamo D 4 Concept Contents: 1. General system description 2. The products: 2.1. D 400 2.2. D 430 2.3. D 450 2.4. D 4CEN 2.5. D 4SUB 3. Driver explanation 3.1. Tweeter 3.2. Mid-woofer/woofer 3.3. (Sub) woofer 4. Electronics (D 4SUB) 5. Cabinets Page 3 3 4 5 6 6 8 9 11 11 12[...]
-
Page 3
3 General description With the Jamo D 4 Concept the goal was to create “the link” between high-end hifi and - surround sound and at the same time focussi ng on versatility – or flexibility – in system configuration and placement. So, what are the “problem areas” in doing that? Well, it could be extended treble response “demanded “ b[...]
-
Page 4
4 Wall mount: The rear wall “amplifies” low frequencies and the floor actually gives a dip in approximately the same range due to the first floor reflection reaching the ear in opposite phase with the direct sound from the speaker. The speaker can be used as full range. In this case the subwoofer should be adjusted to blend in seamlessly in ord[...]
-
Page 5
5 D 450 D 450 is a 2½ way dual bass re flex system featuring a 6½” woofer, a 6½” mid-woofer and a 1” DCD tweeter. The 2½ way configuration has sort of become a hallmark of Jamo. We are using this configu ration in a number of products starting with our highly acclaimed D 870 speaker. The reason for choosing this conf iguration is that it [...]
-
Page 6
6 D 4CEN D 4CEN is a 2 way bass reflex system featuring two 4½” woofers and a 1” DCD tweeter. The design of D 4CEN is kept as compact as possible in order to make it easier to place the speaker close to the TV set. So, the height of just 16-cm/6.3 inch is just enough to house the two powerful 4½” drivers. Actually, you would probably ex pec[...]
-
Page 7
7 As mentioned the D 4SUB goes very low in or der to reproduce the extreme bass contents of movie soundtracks with full authority. However, under certain circumstances this can create a problem, which is why some decoders feature a Boundary Gain Compensation filter. This filter compensates for the room influence at low frequencies, as any room ampl[...]
-
Page 8
8 Drivers Tweeter The tweeter in the D 4 range, has already been well acclaimed in Jamo products, as it is used in th e Jamo D 7 THX Ultra2 system, winner of the EISA awar d as “High-end Home Theatre 2002/2003”. However, to suit the exact purpose in D 4 , we developed a new, asymmetric front baffle. The tweeter was chosen for 3 main reasons: 1.[...]
-
Page 9
9 In fact, the choice of “mot or” materials makes use of magnetic oil for cooling and resonance damping unnecessary! All these features in combination allow the diaphragm to move effortless and the result is a very natural, detailed, dynamic and open sound reproduction. Mid-woofer/woofer The woofer of the D 4 speakers features a bran d new wood[...]
-
Page 10
10 However, the anodised aluminium ce ntre plug is probably the most conspicuous feature of the D 4 woofers. It replaces the traditional dust cap in the centre of the loudspeaker cone at the place where the dust cap would normally be mounted - thereby making the cone lighter and thus faster. Also this prevents potential break-up points where the du[...]
-
Page 11
11 (Sub)Woofer The 8” woofer features a vented magnet system and a Ø 38 mm / 1½” aluminium voice coil former. The 4-layer voice coil is 28 mm / 1.1” long allowing lin ear excursions up to +/- 10 mm / 0.4” – and still with >70% of the B*L product available! The magnet system features a vented pole piece in order to avoid over/under pr[...]
-
Page 12
12 Cabinets All D 4 cabinets are made of heavy MDF board , a solid and resonance dead base for the drivers to work in. However, the most remarkable cabinet feature is probably the Double Curved front baffle. It is common knowledge that one of the most rigid constructions at all is a round shape; a ball, an egg etc. Therefore the front baffle of D 4[...]